// fengshui.js
const lunar = require('./lunar')

// 五行属性定义
const FIVE_ELEMENTS = {
  WOOD: '木',
  FIRE: '火',
  EARTH: '土',
  METAL: '金',
  WATER: '水'
}

// 方位定义
const DIRECTIONS = {
  EAST: '东',
  SOUTH: '南',
  WEST: '西',
  NORTH: '北',
  SOUTHEAST: '东南',
  SOUTHWEST: '西南',
  NORTHWEST: '西北',
  NORTHEAST: '东北'
}

// 风水计算器类
class FengshuiCalculator {
  constructor() {
    this.lunar = lunar
  }

  // 计算风水
  calculate(birthDate, birthTime, gender) {
    // 转换日期字符串为Date对象
    const date = new Date(birthDate)
    const year = date.getFullYear()
    const month = date.getMonth() + 1
    const day = date.getDate()
    
    // 转换为农历日期
    const lunarDate = this.lunar.solarToLunar(year, month, day)
    
    // 计算八字
    const bazi = this.calculateBazi(lunarDate, birthTime)
    
    // 计算五行属性
    const wuxing = this.calculateFiveElements(bazi)
    
    // 计算吉凶方位
    const directions = this.calculateDirections(bazi)
    
    // 生成风水建议
    const advice = this.generateAdvice(wuxing, directions)

    return {
      bazi: this.formatBazi(bazi),
      wuxing: this.formatWuxing(wuxing),
      directions: this.formatDirections(directions),
      advice: {
        houseDirection: advice.house,
        bedPosition: advice.bed,
        doorWindow: advice.window,
        colors: advice.color,
        plants: advice.plant
      }
    }
  }

  // 计算八字
  calculateBazi(lunarDate, birthTime) {
    // 这里实现八字计算逻辑
    return {
      year: { heavenly: '甲', earthly: '子' },
      month: { heavenly: '乙', earthly: '丑' },
      day: { heavenly: '丙', earthly: '寅' },
      time: { heavenly: '丁', earthly: '卯' }
    }
  }

  // 计算五行属性
  calculateFiveElements(bazi) {
    // 根据八字计算五行属性
    return {
      main: FIVE_ELEMENTS.WOOD,
      secondary: FIVE_ELEMENTS.FIRE,
      weak: FIVE_ELEMENTS.METAL
    }
  }

  // 计算吉凶方位
  calculateDirections(bazi) {
    return Object.values(DIRECTIONS).map(direction => ({
      direction,
      status: this.getDirectionStatus(direction, bazi)
    }))
  }

  // 获取方位吉凶
  getDirectionStatus(direction, bazi) {
    // 根据八字和方位计算吉凶
    const statusMap = {
      [DIRECTIONS.EAST]: '吉',
      [DIRECTIONS.SOUTH]: '大吉',
      [DIRECTIONS.WEST]: '平',
      [DIRECTIONS.NORTH]: '凶',
      [DIRECTIONS.SOUTHEAST]: '吉',
      [DIRECTIONS.SOUTHWEST]: '平',
      [DIRECTIONS.NORTHWEST]: '凶',
      [DIRECTIONS.NORTHEAST]: '吉'
    }
    return statusMap[direction]
  }

  // 生成风水建议
  generateAdvice(fiveElements, directions) {
    return {
      house: this.getHouseAdvice(fiveElements),
      bed: this.getBedAdvice(fiveElements),
      window: this.getWindowAdvice(fiveElements),
      color: this.getColorAdvice(fiveElements),
      plant: this.getPlantAdvice(fiveElements)
    }
  }

  // 房屋朝向建议
  getHouseAdvice(fiveElements) {
    return '建议选择坐北朝南的房屋，有利于采光和通风。'
  }

  // 床位摆放建议
  getBedAdvice(fiveElements) {
    return '床头宜靠实墙，避免正对门窗，保持床头整洁。'
  }

  // 窗户位置建议
  getWindowAdvice(fiveElements) {
    return '窗户宜开在东南方向，有利于引入吉气。'
  }

  // 颜色搭配建议
  getColorAdvice(fiveElements) {
    return '建议使用绿色和红色作为主色调，可以增强运势。'
  }

  // 植物摆放建议
  getPlantAdvice(fiveElements) {
    return '可以在东南角摆放绿色植物，有助于提升财运。'
  }

  // 格式化八字输出
  formatBazi(bazi) {
    return `年柱：${bazi.year.heavenly}${bazi.year.earthly} 月柱：${bazi.month.heavenly}${bazi.month.earthly} 日柱：${bazi.day.heavenly}${bazi.day.earthly} 时柱：${bazi.time.heavenly}${bazi.time.earthly}`
  }

  // 格式化五行输出
  formatWuxing(wuxing) {
    return `主五行：${wuxing.main} 次五行：${wuxing.secondary} 弱五行：${wuxing.weak}`
  }

  // 格式化方位输出
  formatDirections(directions) {
    return directions.map(d => `${d.direction}方：${d.status}`).join('，')
  }
}

module.exports = new FengshuiCalculator() 